docs: def enable_memcache(source=None, release=None, package=None):
      """Determine if memcache should be enabled on the local unit
  
      @param release: release of OpenStack currently deployed
      @param package: package to derive OpenStack version deployed
      @returns boolean Whether memcache should be enabled
      """
      _release = None
      if release:
          _release = release
      else:
          _release = os_release(package, base='icehouse')
      if not _release:
          _release = get_os_codename_install_source(source)
  
      return CompareOpenStackReleases(_release) >= 'mitaka'